Will a hard drive with window pre-installed work with the Nuc5i7RYH ?

Hi all,

I plan to buy the new Nuc5i7RYH. I have a 2.5' hard drive that has window 7 pre-installed. It was the hard drive that came with my Dell Studio  XPS 1647 laptop. I have currently replaced it with a Samsung ssd. I would like to ask some questions.

1. Can I use this hard drive in the Nuc without reformatting the hard drive and reinstalling window 7 ?

2. From the product support page, it states that Nuc5i7RYH supports DDR3L 1.35 V DDR3L (low voltage) SO-DIMMs 1333 MHz or 1600 MHz. However, in the tested memory section, it states that it passed testing for some of the DDR3L SO-DIMMs 1866 MHz. Does this Nuc support 1866 MHz ?

3. Can I install together a sata3 ssd and a m.2 ssd card in the Nuc ?

Thanks in advance.